Origin of the name NIDHOGGR.
Etymology of the
name NIDHOGGR.
Meaning of the baby name NIDHOGGR.

NÍÐHÖGGR. Old
Norse name, meaning "cruel biter." Also see Nidhögg,
and Nidhug.

... The squirrel called Ratatöskr
runs up and down the length of the Ash, bearing envious words between the
eagle and Nídhöggr; and four harts run in the limbs of the
Ash and bite the leaves... (The Prose Edda, Sturluson-Brodeur,
1916)